... -cooling, 4-stroke 2)Starting mode: recoil starter 5.5/ 6.5hp Tiller Engine type: 168F, OHV, 1-cylinder, forced air-cooling ... , 4-stroke Displacement: 163cc/196ccMax. Power: 5.5HP/6.5HP/3600rpmGear shifts: -1, 0, +1 (one forward gear, one reverse ...